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. Author manuscript; available in PMC: 2011 Jul 5.
Published in final edited form as: Int J Chem. 2011 Feb;3(1):10–17. doi: 10.5539/ijc.v3n1p10

Table 1.

Apparent formation constants Kf for the complexation between DNS crown ethers, alkaline metal ions and ammonium

Ion Li+ Na+ K+ NH4+
Ligand Kf Kf Kf Kf
DNS15C5 195 160 41 217
DNS18C6 98 155 2.56×104 412
DNSN218C6 9.63 24.3 350 200
DNS2N218C6 N/A 0.77 1.55 0.56